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Finding the Fourth Proportional to 424,228.80, 636,328.80 and 108,688.80

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Solution

The fourth proportional to 424,228.80, 636,328.80 and 108,688.80 is: 163,029.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,228.80 : 636,328.80 = 108,688.80 : x
  2. Step 2: Convert to fraction form
    424,228.80/636,328.80 = 108,688.80/x
  3. Step 3: Cross multiply
    424,228.80x = 636,328.80 × 108,688.80
  4. Step 4: Simplify right side
    424,228.80x = 69,161,813,677.44
  5. Step 5: Solve for x
    x = 69,161,813,677.44/424,228.80
  6. Step 6: Final answer
    x = 163,029.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.